Necronomicon, Book of Dead Names (Necro - Dead, Nom - Name, Icon - Book) is ancient egyptian book about funerals, death and underworld.
It contained the rituals of burial and prayers for example to avoid torment (like eating dung).

Later it was used by writer H.P. Lovecraft in conjunction with his Cthulhu-mythos thus giving occult meaning to it. This connection is, however fictional.

A volume of arcane and occult knowledge featured in the horror stories of H P Lovecraft. Though he made reference to some genuine texts, the "unmentionable Necronomicon of the mad Arab Abdul Alhazred" was entirely his invention. Throughout the Fifties and Sixties his books gained such a following among college students that numerous hoax versions were produced, drawing heavily on his own Cthulhu fiction and the writings of Aleister Crowley.

A possibly lost book containing occult knowledge and wisdom. It was most prominently featured in the works of Lovecraft, and he later claimed that the book was his own invention. However, further investagations show references to the work "necronomicon" much older than Lovecraft so even if he did completely invent all the information in his "unspeakable necronomicon" it is still likely there was some old occult text of the same name that was just wiped from history as part of the cycle of book burnings and european wars.

A work called the "Necronomicon" may have existed, even if it wasn't anything like the book featured in Lovecraft's works.

Thought to be a fictional book referenced in H.P. Lovecraft stories. There have been others who say that there is an actual book that was used by people of the Occult to summon zombies and who knows what else.
There is an actual Necronomicon, but it goes by another name.
The actual Necronomicon is a book by the author Stephenie Meyer, called, 'Breaking Dawn'.

This book is so incredibly evil, that those who read it end up emotionally, and even sometimes physically scarred. Some people have even died from its affect.

Person 1: Dude, you hear about that girl, Melissa? She apparently read 'Breaking Dawn' and now she's in lockdown at the local hospital.

Person 2: Who knew that the Necronomicon would turn out to be an actual book?

Means "Book of the Dead," in Greek. An occult-book *title*, not an actual book, made famous by writer H.P. Lovecraft. Several questionable versions of the Necronomicon were released in the 1970's, although the Avon version is translated from genuine Sumerian texts. The various Necronomicons have no connection to Lovecraft except for the title, which was added as a publicity stunt.

"The Necronomicon was first published about 40 years after H.P. Lovecraft died."